#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
  float fahr, celsius;

  int lower = 0;
  int upper = 300;
  int step  = 20;

  fahr = lower; // from the lower to upper
  while (fahr <= upper) {
    celsius = 5 * (fahr - 32) / 9;
    printf("%.0f\t%.1f\n", fahr, celsius); // print the table
    fahr += step;
  }

  return EXIT_SUCCESS;
}
